Control valve



c. H. GILBERT 2,440,942

CONTROL VALVE Filed July 22, 1946 May 4, 1948.

\ & i fi' l M v 24 l /7 B l5 x5 I /8 a i l3 Inventor T x CLARENCE H.GILBERT $5 4/ 29 .57 wig 0w E a Attorneys Eltented May 4, 1948 i 5.;

UNITED STATES OFFICE 2,440,942 CONTROL verve. Clarence H. Gilbert, GreenSprings, Ohio Application July 22, 1946, Serial No. 685,511

This invention relates to new and useful improvements and structuralrefinements in control valves, more specifically, to a control valvesuch as may be conveniently and effectively employed in association withoil burners, or the like, and the principal object of the invention isto provide a device of the character herein described, which willautomatically out off the supply of fuel to the burner, when the airsurrounding the latter reaches a predetermined degree of temperature.

A further object of the invention is to provide a control valve which isprimarily intended for use in association with kerosene or oil stoves inhouse trailers, or the like.

Another object of the invention is to provide a control valve which issimple in construction and operation, and which cannot easily becomedamaged.

An additional object of the invention is to provide a control valvewhich may be readily disassembled for purposes of cleaning, inspectionor repair.

A still further object of the invention is to provide a control valvewhich will readily lend itself to economical manufacture.

With the above more important objects in view, and such other objects asmay become apparent as this specification proceeds, the inventionconsists essentially of the arrangement and construction of parts asillustrated in the accompanying drawings, in which- Figure 1 is a sideelevation of the invention, illustrating the same in use.

Figure 2 is a side elevation on an enlarged scale, of the invention perse.

Figure 3 is a cross-sectional view of a thermostat used in theinvention, and. showing the attachment thereof to the adjacentstructure.

Figure 4 is a cross-sectional view of the valve body.

Figure 5 is an elevational view in the invention, and

Figure 6 is a further elevational view of the cam, the same beingsubstantially in the plane of the line 6-6 of Figure 5.

Like characters of reference are used to designate like parts in thespecification and throughout the several views.

Referring now to the accompanying drawings in detail, the inventionembodies in its construction a control valve designated generally by thereference character ID, the same consisting of a valve body H, providedwith a main passage l2, as is best shown in Figure 4. The body H isconof a cam used tute's a jaoketfora :a seat I3. A'tubel l is thereof asat'l5,

cuinferential wall 2|, '23 is interposed between 3Claims. (01. 236- I vQ figurated substantially as shown and the passage I2 is angulated in asuitable manner to provide externally threaded at one end I and issecured in a protuberance Hiprovided'on the body I l. The tube l4constislidable needle l1, one end o'f'which is formed with apointedextremity l8, adapted to engage the seat l3. It will be notedthat the engagement of the needle with the seat will e fie'ctivelyprevent the flow of liquid through themain passage l2. v

' {The remaining end of the needle l'l projects from the tube l4 and issecured to one side of an expansible' thermostat l9; This thermostatassumes the form of a pair of spaced parallel discs Eli, connectedtogether by a V-shaped cirand a compression spring the thermostat andthe adjacent'end. ofJthe tube M, as illustrated in the accompanyingdrawings."

A U-shaped yoke 24 is secured at one end thereof to the tube 14, theremaining end of this yoke carrying a sleeve 25. It will be noted thatthe sleeve 25 is axially aligned with the tube l4 and a pin 26 isslidably positioned in the sleeve, as will be clearly apparent from theaccompanying drawings.

One end of the pin 2-6 is secured to the thermostat 19, while itsremaining end bears against the marginal edge of a cam 21. This cam isrotatably mounted upon a pin in a transversely extending slot 29provided in the free end of the sleeve 25. The cam 21 may be inscribedwith suitable graduations 30, these conforming to various degrees oftemperature at which the cutting-off action of the valve is to beeffected.

When the invention is placed in use, the body H is connected at one endto a stove or burner 3| by means of a pipe or conduit 32. The remainingend of the body H is connected by a further pipe 33 to a float valve 34of conventional design, the position of the latter being clearlyapparent from the accompanying Figure l. The

float valve 34 is, in turn, connected by a suitable conduit 35 to a fueltank 36, and a shut-ofi valve 31 is interposed into the length of theconduit 35, for obvious reasons.

The aforementioned spring 23 will normally disengage the needle H fromthe seat I3, so that fuel may flow from the tank 36 to the stove 3|. Asthe temperature of the surrounding atmos phere rises, the thermostat l9will expand ac-. cordingly and urge the needle I! against the seat 28and is positioned I V 3 l3, thereby shutting off the supply of fuelpassing through the passage H, as aforesaid.

The temperature at which this shutting-01f action takes place may be setat a predetermined degree by simply rotating the cam 30, so as tocorrespondingly increase or decrease the resiliency of the spring 23 bysliding'the pin 25 together with the needle I! and the associatedthermostat i9. If desired, the free extremity of the sleeve zs mayterminate inasuitabie pointer 38, against which the graduaticns "3'8ma'y b conveniently read.

It should be also noted that the body I I may be provided with arelatively small bypass v39, such as may be used for supplying fuellight, when the main passage I2 throughthebody H is closed. M: r I

It is believed that the advantages and-used:

4 pression spring between said last-mentioned disc and the adjacent endof said tube, a U-shaped yoke secured at one end thereof to said tube, asleeve mounted on the remaining end of said yoke, said tube and saidsleeve being axially aligned, a pin slidably positioned in one end ofsaid sleeve and secured at one end thereof to the remaining of saiddiscs, the remaining end of said sleeve being formed with a transverselyextending slot, Panda graduated cam rotatably mounted in said slot andengaging the remaining end of said pin.

2. The device as defined in claim 1, in which the end of said sleeveadjacent said cam is provided with a pointed extremity, said extremityconstituting an indicator.

3. =In association with a valve including a flow regulating needle, anautomatic control mechanism comprisinga substantially U-shaped yoke,

the invention will be clearly understood iromathe accordingly, further.point is considered foregoing disclosure and description thereof atthis -ufnnece'ss'ary .v

Wlii'le intiieioregeing there hasbe'en shown and escribed the .preferredembodimer'it of this invention it is to 'be junde'r'stood. thatfgmfinorchanges in the Eleta'ils oif etns rueuoag mtma- -tioniand arrangement of,parts'mayfbe resorted; to 1 without departinglirom the spirit and seepsof the invention as claimed. 7

"What Ielaimas myfin'venpnisi 1, A-contro livalve comprising rec mination, abody provided with a main passageandla'relativel-y smallbypass, a seat m jaidim'aimpassage, a aubesecured eat one end thereof tosaid 'poay, a needle s b bsi ii se d t be ai zeas a e w h a e tene emlzs id aeefi projecting from the remaining end or said-tube, an:expansible thermostat including a pair -of spaced parallel adi'scs, oneof :said :discs being sec'ured to the :proj ectihg end-'01 said needle,-a.com- 40 a tube and a sleeve mounted at the ends of said yoke in axialalignment, said needle being slidable in said tube and projectingtherefrom, a pin s lidabl in said sleeve, a thermostat interposedbetween the projecting .end or sa'id'needle and the "adjacent .end of59.15 pm, a compression spring 25 between said tube and said thermostat,and a cam rotatable onsa'id'sleeve and engaging said pin. CLARENCEGILBERT. REFERENCES "CITED 7 The following references are of record inthe file of this patent:

UNITED srATEsPA I'EN-Ts .Number Name Date 1,449,998 Hunter .Mar. 27,.1923 1,873,124 ,Hill [Aug/23,1932 "1,885,305 Sutton Nov. 1, I932aaotflei Smith Dec. 29,1942 2,241,324 Selby May-6, '1941

